摘要
为提高高瓦斯煤层的瓦斯抽采效果,根据水力冲孔与煤层钻孔的技术特点,研制出了水力冲孔及钻机一体化装置,并对喷嘴进行了优化设计。通过对羊东矿现场试验,确定了水力冲孔后瓦斯抽采有效抽采半径,分析了冲孔后瓦斯抽采变化规律。研究结果表明,水力冲孔装置喷嘴优化有效的降低了憋孔等现象的发生,瓦斯抽采达标时间缩短,提高了工作面的生产效率,水力冲孔后有效抽采半径增大7.0~8.0 m,煤层抽采瓦斯浓度提高了2~3倍,瓦斯抽采量提高了7.5倍。
In order to improve the effect of gas extraction in high gas coal seams,according to the technical characteristics of hydraulic punching and coal seam drilling,a hydraulic Integrated punching and drilling device was developed,and the design of the nozzle was optimized.The effective extraction radius of gas after hydraulic punching was settled and the changing law of gas extraction after punching through the field test of Yangdong Mine was analyzed.The results showed that the hydraulic punching device nozzle optimization effectively reduced the occurrence of hole-holding and the gas extraction time,shortened the gas extraction compliance.The production efficiency of the working face was improved,the effective pumping radius was increased to 7.0~8.0 m after hydraulic punching.The gas content increased by 2 to 3 times and the gas extraction amount increased by 7.5 times.
作者
沈学方
Shen Xuefang(Jizhong Energy Fengfeng Group Corporation Ltd.,Handan 056107,China)
出处
《煤炭与化工》
CAS
2020年第6期113-116,共4页
Coal and Chemical Industry
关键词
水力冲孔
喷嘴优化
抽采半径
瓦斯抽采
hydraulic punching
nozzle optimization
pumping radius
gas pumping
